Back button issues

WE are experiencing problems with the GearVR integration of the Back button behaviour.

After calling via Execute command the OVRGLOBALMENU command appear the “Exit to Oculus Home” screen. Then, if we push the Back button again the game crashes with the classic " stopped working" popup. I’ve been looking in the logcat withe “logcat -s UE4 OVR VrApi VrLib VRSVC HmdInfo” and I’ve not been able to see any strange message that guides me to know what is happening.

I imagine that the Oculus activity is trying to go back to the Unreal Engine’s GameActivity and it fails for some reason, ¿any clues?

Please take a look at Oculus answer: